Evaporator flask for a rotary evaporator



FIG. 1 is a top plan view of an evaporator flask for a rotary evaporator, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof, with all other side elevational views being identical thereto, the broken line showing of the rotary evaporator being for illustrative purposes only and forming no part of the claimed design; and,

FIG. 4 is a perspective view of the flask. 

The ornamental design for an evaporator flask for a rotary evaporator, as shown and described. 